Gas-burner with gas and air controlling means.



E. W. VEST. GAS B URNER WITH GAS AND AIR CONTROLLING MEANS'.

APPLICATION FILED MAY 25. 1917.

' Patented Mar. 19, 1918.

2 SHEETSSHEET h E. W. VEST. GAS BURNER WITH GAS AND AIR CONTROLLING MEANS.

APPLICATION FILED MAY 25. 19!]. Patented Mar. 19.

2 SHEET$-SHEET 2- UNITED STATES PATENT OFFICE.

EUGENE W. VEST, OFST. LOUIS, MISSOURL- Gas-BURNER WITHYGAS AND am CON R LL NG 'mnans.

1 '0 all whom it may concern:

Be it known that I, EUGENE W. VEST, a citizen of the United .tates of America,and a resident of the city of St. Louis, State of Missouri, have invented certain new and useful Improvements in Gas-Burners with Gas and Air Controlling Means, of which the following is a full, clear, and exact descriptiomreference being had to the accompanying drawings, forming a part ofthis specification.

My invention relates to an appliance for controlling the delivery of gas and air mixture to oneor more burners. Themain objects of the present invention are to provide fora varied degree of flow of gas and air mixture to burners, to effect a corresponding change of flow gas and air mixture to two or more burners, and further, to provide a construction whereby two or more burners may be supplied truth a corresponding quantrty of gas and air, and the del1v- .eryof gas and air to a third burner maybe regulated independently of the regulation to the other burners.

Figure I 1s a front elevation of a cooking range having my gas burner controlling appliance applied thereto, the front walls of the rangebeing partly broken away to show one of the burners withm the range.

Fig. II is an end 'elevatlon of the range and burner controlling appliance, the burners being shown in dotted lines.

Fig. III'is'an enlarged front elevation. of one of the gas and air mixers.

Fig. IV is an enlarged vertical section of one of the gas and air mixers.

Fig. V is a vertical crosssection taken on line VV, Fig. IV.

Fig. VI is a vertical cross section. taken on line VIVI, Fig. IV. I

In the drawing, A designates a cooking range, and B is the combustion chamber in said range.

1, 2 and 3 designate gas burners,located in the combustion chamber B, the burner 3 being-centrally located relative to the other burners. Gas delivery pipes 4, 5 and 6 lead, respectively, to the burners 1, 2 and 3.

to thenumber of burners are located exteriorly of the combustion chamber B, and

gas is supplied tosaid mixers for delivery to the burners 1, 2 and 3. Gas is delivered Specification of Letters Patent. Patented lvlagr. 19, 1918.

Application filed May 25, 1917. Serial No. 170,873. A

the mixers through the medium of cut-off valvesll interposed between the mixers and the conducting pipe.

Each gas and air mixer is, in general, of a constructionsomewhat similar to'the gas and air mixer shown and described in Letters Patent. No. 1,105,987, issued Aug. 4,

bustible'mixture of gas and air. The mixer also includes a vertical air admission leg 13 separated from the leg 12 by a partition '14 extending downwardly from the upper end of the mixer to a point above the lower end of the leg; 13. The open upper end of the air admission leg 13 preferably contains a screen 15 by. which dirt or other foreign matter is excluded from entrance into said leg.

A 'gas admission nipple16 is so located in the gas and air mixer as to communicate with the gas delivery connection leading from the conducting pipe 10 and extends vertically into the mixing leg 12 to a po nt above the lower end of the partition 14. Said nipple is provided at its upper end with a valve housing 17 the orifice through the nipple being located partly beneath and which is rotatably 'seatedin the valve housing 17 of the nipple 16, and contains transverse ducts 22 and 24, the said ductsb1secting each other, as seen in Fig. V. The valve stem 18 i adapted to be so adjusted that th inlet end of either of the ducts 22 or 24 will be placed in communication with the por- 'tion of the orifice in the nipple 16 leadmg to the valve housing 17 The duct 22 s re- Gas and air mixers 7,8 and 9- correspond stricted at its outlet end, as seen at 23, and

the duct 24 is restricted at its outlet end, as

seen in Fig. V, the restriction of the last mentioned duct being greater than that of the first mentioned duct. It will be apparent, that whenthe valve 21 is 'ad usted to r eee the du 22 in eg st at n wi h t e duct leading through the nipple 16 flow of gas will occur through the valve, and the same is true when the valve is ad uSted to place the duct 24 in registration with said air into said mixing leg the valve stem 18 includes a fiat section which extends diametrically of the air admission leg 13 and fiat sections 27 and 28 located at opposite sides of the valve 21 and within the mixing leg 12. vVhen the valve 21 is in position for the delivery of a maximum flow of gas through its duct 22, the fiat or non-circular sections 26 27 and 28 are parallel with the path of movement of air to the mixing leg 12, (see full lines Fig. IV) and, consequently, there is maximum delivery of air to said mixing leg for admixture with the gas flowing thereinto. Upon the valve device being turned so that a lesser quantity of gas passes to the mixing leg 12 through the duct 2 1, the non-circular sections 26, 27 and 28 are also turned so that they occupy the position indicated by dotted lines Fig. VI, andpartially ballie the passage of air to the mixing leg, with the result of restricting the delivery of air to a degree commensurate with the restriction of the delivery of gas to the mixing leg.

In the use of my appliance, it is desired to provide for a uniform flow of combustible mixture from the gas and air mixers 7 and 8 to the endmost burners 1 and 2 at all times, whether this flow be the maximum flow or the minimum flow. It is also desirable to control the delivery of combustible mixture to the central burner 3 uniformly with the control to the other burners at certain times, but not at other times. To provide for the desired controls, I connect the crank arms 19 of the valve devices 18 in the gas and air mixers 7 and 8, which communicate with the burners 1 and 2, by a shift bar 29 loosely connected to the pivot members 20 of said crank arms, and I use a separate shift bar 30, which is pivoted to the pivot member 20 of one of the crank arms 19, said last named shift bar being adapted todetachably engage the pivot member '20 of the crank arm .19 on the valve stem mounted in the gas and air mixer 9. 'VVhen the shift bar 30 is,

I in engagement with the crank arm 19 of the mixers may be adjusted simultaneously and there will be corresponding delivery of combustible mixture to all of the burners 1, 2 and 3. By disengaging the shift bar 30 from the crank arm of the valve stem in the gas and air mixer 9, the delivery of com bustible mixture to the burners may be altered, a greater quantity being delivered to the center burner 3 or a greater quantity to the outer burners 1 and 2 as may be desired by the operator.

The shift bars 29 and 30 are provided with push arms 29 and 30 by which they may be operated. Attention is directed to the fact that the crank arms 19 of the valve stems 18 serve as indicators of the positions occupied by the valves 21, consequently, knowledge of the delivery of a maximum or minimum supply of combustible mixture to the burners is constantly'aflorded and there is no necessity of opening the cooking range to observe the force of the fire at each of the burners in the range.

In View of varying pressures of gas at different locations it is quite desirable to provide means, in addition to the non-circular portions 26, 27 and 28 of the valve stems 18, for controlling the ingress of air into the air admission legs 3 of my gas and air mixers. The means shown for this purpose isa check plate 31 adjustably secured to each gas and air mixer and movable to and from the mouth of the air admission leg to regulate the quantity of air entering thereinto.

I claim r 1. The combination with a plurality of gas burners, of a plurality of gas and air mixers having communication with said burners, double ported valves for control ing the delivery of gas to the mixing chambers of said mixers, and means forcausing said valves to be operated in unison.

2. The combination with a plurality of gas burners, of a plurality of gas and air mixers having communication with said burners, gas inlet members through which gas is admitted to said mixers, valve stems having double ported-valves arranged in said inlet members, and means for operating two or more of said valve stems in unison to provide for uniform delivery of combustible mixture to two or more burners.

3. The combination with a plurality of gas burners, of a plurality of gas and air mixers having communication with said burners, valves for controlling the delivery of gas to said mixers, means whereby two of said valves may be operated in unison,

and means whereby a vali e in a third mixer may be caused to move with the two first mentioned valves, said last named means being detachably moun ted to permit operation of the third valve independently of the other valves.

l. The combination with a plurality of gas burners, of a plurality of air mixers having communication With said burners, valve stems having valves for controlling 5 the delivery of gas to said mixers, said valve stems being provided with crank arms, a connoetingbar pivoted to two of said crank arms, and a second connecting bar whereby the crank arm of a valve arranged in a third mixer may be detachably connected to the crank arm of a valve stem in one of the other mixers.- V

5. A gas and air mixer comprising a mixing leg, an air admission leg communicating with said mixing leg, a nozzle extending into said mixing leg, a valve stem mounted in said mixer having a double ported valve movably seated in sald nozzle, one of the ports in said valve being larger than the other, said valve stem having non-circular portions traversing said air admission leg Wherebythe passage of air to said mixing leg may be regulated. r

6. A gas and air mixer comprising a mixing leg,.an air admission leg communicating with said mixing leg, a nozzle extendin into said mixing leg, a valve stemmounte in said mixer having a double ported valve movably seated in said nozzle, one of the ports in said valve being larger than the other, said valve stemhaving non-circular portions traversing said mixing leg and air admission leg whereby the passage of air to said mixing leg may be regulated.

In testimony that I claim the foregoing I hereunto aflix my signature.

EUGENE W. VEST.

Copies of this patent may 1 obtained for five cents each, byaddressing the Commissioner 0! Patents,

Washington, D. G. i 

